... Field of research: Extragalactic astronomy. ... NASA Astrophysics Data System (ADS) Abstract Service . ... CADC Home Page . ... CCD Images of Galaxies . ... RUSSIAN LINKS . ... UA Astronomy Personal Home Page - Bill Keel . ... The Shape of the Rotation Curves of Edge-on Galaxies, by A.V.Zasov and A.V.Khoperskov, 2003. ... A Thickness of Stellar Discs, by A.V.Zasov, and D.V.Bizyaev, 2003 . Minimum Velocity Dispersion in Stable Stellar Disks, by A.V.Khoperskov, A.V.Zasov, and N.V.Tyurina, 2003 . ...

XMM­Newton CCF Release Note XMM­CCF­REL­254 EPIC MOS screening thresholds C. M. H. Chen, R. D. Saxton 15 July 2009 1 CCF components Name of CCF VALDATE EVALDATE Blocks changed XSCS flag EMOS1 SCREENTHRESH 0001.CCF 2000­01­01 SCREEN THRESH NO EMOS2 SCREENTHRESH 0001.CCF 2000­01­01 SCREEN THRESH NO 2 Changes These files give the screening thresholds which should be used when determining the low­energy noise properties fo the MOS CCDs. ... They have detected no noisy observation in the remaining CCDs. ...

... Properties of Dust Grains in Planetary Nebulae - I. The Ionized Region of NGC 6445 . ... Based on this model, we show from depletions in the gas phase elements that little grain destruction can have occurred in the ionized region of NGC 6445. ... The most likely conclusion is that grains are residing inside the ionized region of NGC 6445 and that the low temperature and flux of the grain emission are caused by the low luminosity of the central star and the low optical depth of the grains. ...

... Astronomy in Ukraine Past, Present, and Future (MAO-2014) . ... Erik Hog (Niels Bohr Institute, Copenhagen, Denmark) Absolute astrometry in the next 50 years Abstract . ... In brief, the two Gaia-like missions would provide an astrometric foundation for all branches of astronomy from the solar system and stellar systems to compact galaxies, quasars and dark matter (DM) by data which cannot be surpassed the next 50 years. ... Is there any future for the ground based astrometry technique now? ...

... Our Galaxy . ... Stars . ... Image credit: ESO, Acknowledgement: VST/Omegacam Local Group Survey) . First observed in 1909, the WLM galaxy is part of the Local Group, about 10 million light years (3.1 Mpc) across, this is the set of more than 35 galaxies which includes our own Milky Way. ... I compared this little galaxy to a living fossil because looking at it gives us an insight into a past era in the UniverseтАЩs history. ... Distances and metallicities for 17 Local Group galaxies? . ...

This huge elliptical galaxy NGC 5128 (Centaurus A) is the closest such galaxy to Earth, at a distance of about 12 million light-years. Observations with ESO s Very Large Telescope in Chile have discovered a new class of dark globular star clusters around this galaxy. ... Normal globulars are marked in blue and globulars showing similar properties to dwarf galaxies are in green. The dark globulars appear very similar to other globulars around this galaxy but contain much more mass. ...

... Subject and Problems of Stellar Astronomy. ... Plane of Galaxy, Methods of Its Location Determination. ... Stars Distances. ... Other Methods of Stars Distances Determination. ... Tangential Velocities, Their Determination by Self-Motions. ... Determination of Solar Apex and Spatial Velocity by Radial and Spatial Velocities of Stars. ... Features of Orientation and Parameters of Peculiar Stellar Velocities Ellipsoid. ... General and Selective Light Absorption in Galaxy. ... Darc Clouds in Galaxy. ...

... It has been largely superceded by MatWeb . Conversion Factors . Material properties . Physical constants . Astronomical constants . This table gives conversion factors to convert various units to their SI equivalents. ... The units are SI. This is a short list of physical constants in SI units. ... Boltzmann constant . ... Gas constant . ... Mass . ... Plank's . ... Radiation constant . ... This is a short list of astronomical constants in SI units. ... Sun . ...

... Future seminars . P a s t seminars . Seminar council . Collective processes and structures in spiral galaxies " . ... A new approach to studying global structures in thin stellar disks, which allows to describe universally both bar and spiral modes, is presented. ... Study of line-of sight velocity maps of gaseous disk in spiral galaxies allows, under some conditions, to reconstruct 3 components of gas velocity in the galactic plane. ...

Physical Properties and Internal Structure of Near-Earth Objects . ... The review contains the most recent data on near-Earth objects such as their sizes and densities, rotation and shapes, taxonomy and mineralogy, optical properties and structure of their surfaces, binary systems among the NEOs and internal structure of asteroids and comets constituted the NEO population. ... The European space mission ISHTAR, NEO 4660 Nereus, NEO 5797 Bivoj. ...

The infrared satellite IRAS. The main task of the IRAS telescope was the search of a longwave infrared radiation, composing the maps of the sky in the infrared range. IRAS telescope helped to discover new galaxies, to study the properties of the dust particles in our galaxy, which opens the character of a star hiding somewhere in the sky. ... For 6 months of observation it discovered 6 new asteroids, allowed to find out the nature of the dust zones between Mars and Jupiter orbits. ...

Class 1 Introduction, Background History of Modern Astronomy The Night Sky, Eclipses and the Seasons Kepler's Laws Newtonian Gravity General Relativity Matter and Light Telescopes Class 2 Solar System Characteristics Formation Exosolar Planets Class 3 Stars The S un Stellar Evolution of Low and High Mass Stars Deaths of Stars Exotic Stars Class 4 Galaxies Galaxy Classification Formation of Galaxies Galactic ... Low mass stars live and die differently than high mass stars. ...

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Clusters of galaxies are the largest gravitationally bounded structures in the Universe dominated by dark matter. We review the observational appearance and physical models of plasma structures in clusters of galaxies. ... The knowledge of the complex dynamical and feedback processes is necessary to understand the energy and matter balance as well as to constrain the role of the non-thermal components of clusters. ...

... The bright supernova (hereafter SN) in the galaxy NGC 4527 was first sighted by S. Knight (USA) on April 13.17UT at magnitude ~14.0v. The report of the sighting was subsequently forwarded by phone to the AAVSO. ... SN 1991T. The galaxy NGC 4527 is an Sb(s)II type galaxy with an apparent Blue magnitude of 11.32 (Shapley-Ames, 1981). ... An analysis of this event utilizing visual observations by amateurs, plus a light curve is presented.. ... THE LIGHT CURVE: . ... ISN SN 1991T web page . ...

... Mathematical methods in physics . ... NUCLEAR PHYSICS . ... CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES . ... Mechanical and acoustical properties of condensed matter . ... Thermal properties of condensed matter . ... CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES . ... Electronic transport in condensed matter . ... Optical properties, condensed-matter spectroscopy and other interactions of radiation and particles with condensed matter . ...

Abstracts Navigation of high-apogee orbit of the SRT in RadioAstron mission Akim E.L., Keldysh Institute of Applied Mathematics Bebenin R.M., Astro Space Center of the Lebedev Physical Institute Ponomarev Yu. ... OH masers, OH megamasers, and nuclear starbursts Baan Willem, ASTRON, The Netherlands The nature and structure of high-gain OH maser emission sources will be considered in Galactic and extragalactic sources. ... However, they are incompatible and may show inconsistencies with observations. ...

University Satellites and . Space Science Education . ... Simulation of Carrier Phase GPS Observables and Feasible Attitude Determination Algorithms for Universitetskiy-Tatyana Satellite . ... Carrier phase observables of radio signals transmitted by navigation satellites, when obtained from multiple antennas, potentially could provide the most accurate and stable solution for attitude determination among other methods. ...

Blackholes Forum Message . ... Good Question. ... We really don’t know what causes gravity ( mass properties ) only how it works in the present universe state. ... It may be that you have just proven your assumption is wrong and gravity/mass properties do depend on the present universe state to exist. ... www.astronomy.net . About Astronomy Net | ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...